Physics - Vectors Question with Solution | TestHub

A vector $\vec{A}$ having magnitude 6 units is added to vector $\overrightarrow{\mathrm{B}}$, which is along $\mathrm{x}$ -axis. The resultant of $\vec{A}$ and $\vec{B}$ is along $Y$ axis. If the magnitude of the resultant of $\vec{A}$ and $\vec{B}$ is three times that of $\vec{B}$ then magnitude of $\vec{B}$ is